Musician Ian Axel of A Great Big World (L) and singer Christina Aguilera perform onstage during the 2013 American Music Awards at Nokia Theatre L.A. Live on November 24, 2013 in Los Angeles, California.

Singers (L-R) Liam Payne and Louis Tomlinson of One Direction accept the Favorite Pop/Rock Album award for 'Take Me Home' onstage during the 2013 American Music Awards at Nokia Theatre L.A. Live on November 24, 2013 in Los Angeles, California.

Singer Rihanna (L) accepts the AMA Icon Award from mother Monica Braithwaite Fenty onstage during the 2013 American Music Awards at Nokia Theatre L.A. Live on November 24, 2013 in Los Angeles, California.